How many calories should you actually eat? Get your personalized daily target based on your BMR, activity level, and goals — lose, maintain, or gain weight with real numbers.
A calorie calculator estimates your daily energy needs based on your age, gender, weight, height, and activity level. Understanding how many calories your body needs is the foundation of any nutrition plan, whether your goal is to lose weight, gain muscle, or maintain your current weight. Registered dietitians use the clinical BMR TDEE caloric deficit calculator for nutritionists for evidence-based weight management protocols and patient meal planning. Nutritionists rely on the dietitian macro-nutrient weight loss planning tool to compute precise macronutrient splits (protein, carbs, fat) aligned with caloric targets. Fitness professionals apply the personal trainer calorie estimation professional tool for designing customized nutrition protocols for athletes and clients with specific body composition goals.
Your Total Daily Energy Expenditure (TDEE) is the total number of calories your body burns in a day, including your Basal Metabolic Rate (BMR) — the calories needed for basic bodily functions at rest — plus calories burned through physical activity. By comparing your TDEE to your actual calorie intake, you can create a calorie deficit for weight loss or a surplus for weight gain.
A 30-year-old woman, 165 cm tall, weighing 65 kg, with moderate activity: BMR = 10 × 65 + 6.25 × 165 - 5 × 30 + 5 = 650 + 1,031.25 - 150 + 5 = 1,536 calories. TDEE = 1,536 × 1.55 = 2,381 calories/day. For weight loss (500 calorie deficit): ~1,881 calories/day.